Upgrading from Umbraco 10 to 13

Questions
1

I am trying to Upgrade from V10 to V13 and I am getting the following:

Package restore failed. Rolling back package changes for 'UmbracoCMS'.
Version conflict detected for Umbraco.Cms.Web.BackOffice. Install/reference Umbraco.Cms.Web.BackOffice 13.9.2 directly to project UmbracoCMS to resolve this issue. 
 UmbracoCMS -> Umbraco.Cms 13.9.2 -> Umbraco.Cms.Targets 13.9.2 -> Umbraco.Cms.StaticAssets 13.9.2 -> Umbraco.Cms.Web.BackOffice (>= 13.9.2 && < 14.0.0) 
 UmbracoCMS -> Umbraco.Forms 10.5.7 -> Umbraco.Forms.StaticAssets 10.5.7 -> Umbraco.Cms.Web.BackOffice (>= 10.0.0 && < 11.0.0).

Followed the steps in Upgrade your project | Umbraco CMS

2

Well, it’s right in the error, right? You need to update Umbraco Forms as well.